3. Very few people here have said NOTHING should be done

That's a strawman argument. Many here who are pro-gun have offered up ideas to address gun violence and gun accidents, including increased gun control measures. I myself would be willing to see the old Assault Weapon Ban re-instated. I can live with 10-round magazines for my guns, a ban on the purported gun show loophole, etc.

The problem is that many people here on DU have in recent days called for a complete ban on ALL guns and/or a repeal of the 2nd Amendment. People who own guns, even those who own nothing more than an old deer rifle, have been vilified, called NRA shills, enablers of murder, etc. That makes otherwise reasonable, sensible people who own guns a bit defensive on the subject of gun control.